Carbon microsphere from water hyacinth for supercapacitor electrode

Kurniawan, Fredi and Wongso, Michael and Ayucitra, Aning and Soetaredjo, Felycia Edi and Angkawijaya, Artik Elisa and Yi-Hsu, Ju and Ismadji, Suryadi (2015) Carbon microsphere from water hyacinth for supercapacitor electrode. Journal of the Taiwan Institute of Chemical Engineers, 47. pp. 197-201. ISSN 1876-1070

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Official URL: http://dx.doi.org/10.1016/j.jtice.2014.10.002

Abstract

In this study, water hyacinth was hydrolyzed to sugars with dilute sulphuric acid (0.25 M) under subcritical water conditions (P = 20 bar, T = 130 8C) for 2 h. The sugar solution was then carbonized under subcritical conditions to produce carbon microsphere. The subcritical water carbonization was conducted at 40 bar and various temperatures (160–200 8C) and times (6–10 h). The highest yield of carbon microspheres was 0.1019 g/g dry water hyacinth at the temperature of 200 8C for 10 h. The carbon microsphere was activated using a combination of chemical (KOH solution) and physical (microwave) treatments to increase the specific surface area and porosity of carbon microsphere. Electrocapacitive study of carbon microspheres showed that the carbon microsphere activated at impregnation ratio of 1:1 and microwave power of 630 W has the highest specific capacitance and excellent electrochemical stability.

Item Type: Article
Uncontrolled Keywords: Carbon microsphere Subcritical water hydrolysis Subcritical water carbonization Microwave activation
Subjects: Engineering
Engineering > Chemical Engineering
Divisions: Faculty of Engineering > Chemical Engineering Study Program
Depositing User: Suryadi. Ismadji
Date Deposited: 22 Jan 2016 06:34
Last Modified: 19 Jul 2018 08:30
URI: http://repository.wima.ac.id/id/eprint/4179

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